It depends on what sort of decoration you are using in the tank and where the water level comes to. If the tank is heavily decorated and only 3/4 full, you might find that only 75% of the total capacity is used. If it is full and lightly decorated it may be more than 95% total capacity. The best way to tell is to use a bucket of known volume to fill the tank. Multiply the volume of the bucket by the number of times you emptied it into the tank to find the amount of water that is in the tank.
163 55-gallon drums.
It's exactly 163 Euros.
163 cm = 5' 4.2"
163 cm = 5.35 feet
163
163
163lb = 73.94kg
156-163 grams
163 meters under water
163 lbs
163
163 = 163/1